Why Is my Fuel Gauge Stuck on Empty. Fuel Gauge Errors (advised from Ford) FordExcursions. Gauge says full and then empty right away. 1/4 tank of gas. 2004 GMC Sierra. I filled up my gas tank at sunoco, and after 75miles of driving i noticed something not normal with the fuel gauge. It’s possible that the fuel gauge itself has become faulty. like something is loose on the sending unit. Any ideas if this is a problem at the tank level sensing unit or the gauge itself?. i was also told that i could be a problem with the dash. He says it could be an issue with the fuel level sensor. I disconnected the sender and the gauge read full, then i turned the car off and turned it back on and it read 3/4, and then 1/2 after I repeated the process. This is a 2017 Scarab 215. Another, less common, symptom of an issue with the fuel gauge sender is a fuel gauge that is stuck on full. Next, check the fuel tank float assembly to see if the grounding terminal on the float assembly has a good grounding point to the. Likely that the gas gauge sender that is tack-welded to the fuel pump has gone bad. A bit of background: My fuel gauge has never been accurate. It's a brand new gauge, brand new 66 Mustang sending unit in a new 66 Mustang gas tank. The fuel gauge sender unit that tells the gauge how much gas is in the tank is located behind the fill port on top of the tank. Its like a dimmer switch on a float - the more fuel the brighter the light or in this case, the more the gauge reads. It could be the wire that connects the two, or the gas tank sending unit (the device in the tank that measures the fuel level and tells the needle where to point). Shop, read reviews, or ask questions about Fuel Gauges at the official West Marine online store. Saturday, May 01, 2010. RE: My gas gauge is stuck on full. I have a 2003 Maxum 2100 SR and the fuel gauge is stuck showing full regardless of the tank level. Is the fuel gauge supposed to cycle. is this the sender if so how hard is it to remove the tank this my first k5 blazer usually i normally trucks of the same vintage. Gauge goes all the way over to 3 o'clock way past full. We are working on this job that was installed in 1968 with TW solid wire. Don´t know about the 94, but in the earlier models, a gas gauge stuck in the full position, meant an open circuit, a plug unplugged or a broken wire (back by the gas tank/ a branch would get stuck in there and pull the connector apart or break the wire). Ran out of gas going 70mph on turnpike it was harrowing. 3t Recently, on the last 2 fill ups, when I fill up the tank completely and restart the car the gas gauge is showing as completely empty and the fuel light is on. I drove the car 200 miles since then and the gas hand still says full and hasn&. Filled up on Sunday, and ever since then, fuel gauge is stuck on full even though I've driven it daily. We filled it in Frisco, CO, drove four hours in heavy, slow traffic on I-70 to get home (approx. If it does not, then the odds are that the gauge or anti-slosh unit are bad. I freed it and gauge now reading as correct as GM fuel gauge can. We are the premiere place for 1st gen and 2nd gen Dodges as well as a great source for newer models as well. Replaced gauge with gauge out of 85 truck same thing. With an ohmmeter, attach the red lead on the sending unit terminal, and the black lead to ground on the sending unit. Hey guys, this seems to be a pretty common problem and im tryin to figure it out but no luck so far. The simplest explanation of a faulty fuel gauge is that the float in the gas tank has gotten stuck in a certain position. Tapping tank didn't help. Oh Well! RJ. I would think that maybe when it is full, and the gas sloshes around, it may push the float up and it gets stuck. I have an '03 Sequoia and the fuel gauge frequently gets stuck on empty, even though I have between 1/4 and 3/4 tank left. Ok, i have a 1988 E. She said the low fuel light is on but the guage is reading 3/4 full and that she had been putting gas in when the light would go on (teenagers!). So, added about 4 -5 gallons, restarted andfuel gauge reads full. I tapped the tank with a rubber mallet and it fixed it so I just assumed I had a stuck float. “As of 2 weeks ago, immediately after filling up, I noticed that the fuel gauge wasn't showing a full tank. As full-size pickups do their best to eke out as much fuel economy as possible, the upcoming Chevrolet Colorado and GMC Canyon are set to deliver a combined 21 mpg once they leave the lot for the road. -After a fill-up I noticed the fuel gauge didn't rise up past 1/2 tank. I put some petrol in and when I restarted the car, the perol light was still on, the gauge hadn't moved, and the trip computer still said I had no miles left. Fuel gauge stuck on empty. Worked fine until I filled and then stuck again. any ideas why a 2000 Buick Century's fuel gauge in the dashboard would stay at "FULL" all the time. And the Infotainment Range figure is based on the fuel gauge reading. This is weird, I stumbled on this thread just now, my 2004 w/288,000 miles has the fuel gauge stuck, on full, then it will be stuck on 1/2, but it isn't reflecting the actual gas. The gauge never came back up and is stuck on empty. Hey guys so I have a problem with my fuel gauge. This is the only significant issue that I have yet had with the 1290 and I have almost 2000 miles on it. That would leave stuck or bad sender as problem. If not, you have a wiring problem or a bad gauge. I just did 650 miles on 24. My fuel gauge is fine when it's full. Find out How To Diagnose Gauge Problems in the March issue of Mustang Monthly Magazine. Is it bad gauge or what?. Gauge says full and then empty right away. uel level gauge not working in 2002 Boxster S 2002 Boxster S with 45,000 mi. If the gauge moves then the problem is in the sending unit. I just got a 1997 Riviera with 45,000 original miles. Bad news on my part. -After a fill-up I noticed the fuel gauge didn't rise up past 1/2 tank. Just the fuel gauge is out Supplement. Could anyone tell me if this may be a easy fix or not. The following week, she took the car to the local dealer. What should I do. I have attached some photos with voltage results on them. Is the fuel gauge needle in your vehicle stuck beneath the pin or is it fluctuating from the full mark to the empty mark in a haphazard manner? Read on to know how you can fix your vehicle fuel gauge that is not working properly. Today I started the car up and it had moved 5º back to the middle so it was exactly on half again. the fule level sensor monitors the amount of fuel in the tank and sends the information to pin J2-17 of CCM2 (connection X016). Then the needle drops down to empty and the low fuel light comes on. I thought maybe the float was stuck at the top and refilling would dislodge it. I have searched and have found alot of problems with the fuel gauge in the Tundra. I have a Dec 97 EL Futura 4 litre with a misbehaving fuel gauge. This is also when they installed a work charger, just recently. Another, less common, symptom of an issue with the fuel gauge sender is a fuel gauge that is stuck on full. When it happened yesterday I filled the tank - with only 5 gallons. The car runs without any problems though my fuel gauge is stuck at. So on the way up the gauge worked fine, its just on the way back it is stuck on full. I put a good half a tank of fuel in and drove a bunch of bumpy roads, but that didn't work. If you have a long/thin battery powered trouble light with a thin mirror, point it into the tank and see if the float is stuck in the up position. Just grabbed a piece of metal, did the measurements and made them fit to either my heater vent, or gauge cluster. I have no idea where to start troubleshooting. The car has 2 floats in the fuel tank, sometimes 1 or both get stuck and show the tank to be completely full or completely empty. My fuel gauge is stuck on my Deere garden tractor how do I get the float or what ever controls the gauge unstuck itis a - Answered by a verified Technician. My fuel gauge is stuck on my Deere garden tractor how do I get the float or what ever controls the gauge unstuck itis a - Answered by a verified Technician. It was pulled back over the. Gas Gauge Failure is less common, but still a possible issue. My fuel gauge is stuck on my Deere garden tractor how do I get the float or what ever controls the gauge unstuck itis a - Answered by a verified Technician. I went down and bought a new fuel pump for it, but before removing the old pump, I thought I might test it. My gas gauge is stuck on full, when I turn the 2007 ford edge off. I've always carried with me the idea that the fuel gauges on sailboats are often wonky or downright inaccurate, so I record and track my engine hours and fuel usage and this has served me well, but the gauge on my 2004 B323's tank is pegged to full all the time and doesn't budge. Yes the cruise was set about 75. the fuel gauge stays on full. Hi my wife's 2000 Vx sedans fuel gauge is stuck on full It was on a quater of a tank the other day then I got into drive it yesterday and it was reading full I thought my wife had filled it up and forgot to reset the trip but she hadn't And since driving a fair bit yesterday it still hasn't moved Can anyone give me any insight on what may cause. Fuel Gauge stuck on empty even though there's fuel ?? Hey guys! So yesterday I am driving, have about half a tank of fuel and next thing the fuel gauge just drops to empty and the red "low on fuel" light goes on. I can manage it on the basis of known MPG vs actual miles since fill up, but is there a quick fix, does anyone know?. Curiously the gauge did move a littlefrom pegged all the way to just a hair below the "full" mark. The fuel gauge is ALWAYS full - boat off, battery switch off, cables from fuel baffle and even to gauge disconnected etc. "On equipment that has not been used a whole lot, you could get a loose wire connection," says Kolbeck. Ok, so I figured out my electrical gremlin causing stuck fuel gauge below empty. Replacement Parts: Tank Sending Unit Sending Unit Float (only if not replacing the full unit) Voltage Regulator. I can get the car to start if the carb bowl is full, but once it is running the fuel pump stops sending fuel. So I put $20 worth of gas in it today and it still didnt move. This is weird, I stumbled on this thread just now, my 2004 w/288,000 miles has the fuel gauge stuck, on full, then it will be stuck on 1/2, but it isn't reflecting the actual gas. The transmission exploded shortly after but I doubt the MMO had anything to do with that. Used to have a boat with a tank that occasionally stuck on fuel, the electrics were fine, it was the guage arm that got hung up. But today, the low fuel warning light came on and it appears to be functioning properly. I think my fuel pump/sending unit may be on the way out. When I got the car the gas gauge was reading slightly over Full. My fuel gauge does not go down when I turn the car off like all the other gauges. It also goes to full when the sending unit is attached and the ground is removed from the sending unit. I have found the fuel sender and when i unplug it (with ignition on) the fuel gauge drops to empty. Titan Gas Gauge stuck on full The problem with the gas gauge sticking on full began the second day after I took delivery. I have a 93 EB with 186,000 miles on it now (all mine) and it set for the past week (Memorial day week 2005) with a full (almost full) tank of fuel. This Site Might Help You. If you short the send terminal to ground and turn the key on, the gauge should read full. Reply 1: There is a inline connector back by the gas tank, unplug it if the gas gauge goes to empty then you have a bad fuel. Re: Fuel Gauge Stuck as Full MH has it correct. Unbeknownst to me when I bought the vehicle 2 days ago the fuel gauge never moved off a half tank. When i turn the ignition on, it still moves and when i start the truck it recalibrates as it always did just upside down now. I have found the fuel sender and when i unplug it (with ignition on) the fuel gauge drops to empty. I filled it up after the first click from the pump and now my gauge seems to be stuck a full after 70+ miles. 2004 GMC Sierra. The current owner states that he replace the fuel pump a couple years ago and the fuel gauge has been stuck since then. Any easy way to isolate the problem to the sender or the instrumentation? Probably gonna be the sender and I sure don't want to drop the tank. My mechanic says it's the fuel sending unit and will cost $250 to replace. the ground wire under your console. The fuel gauge in my 1999 Corolla is stuck on Full. And if I unplug the wire from sending unit to gauge it still reads past full. I have tried to run it down to less than half and tank and fill it back up to see if that would help, but it still stays in the full position. RE: My gas gauge is stuck on full. Tried to fix the gas gauge,sticking a wire in to pull the needle over the full notch. A gauge that goes to full all the time seems like it must have some sort of short in the system, or the sending unit float is mechanically stuck in the full position. I knew that tank was at least 1/2 full before battery died, so I thought maybe gas siphoning gremlin got me as car was left unlocked night before battery died. Tapping tank didn't help. Take your test light and connect the one end to ground. The gauge is still stuck on full. Non-working Fuel Gauge Right now my guage is stuck halfway and I can't tell if it is half full or half empty. Hi guys, The fuel gauge on my Audi TT Quattro 2000 Mk1 is stuck on full. Question: Battery problem caused all needles in dash to fly rapidly back and forth, all needles went back to normal, except the gas gauge needle which stuck over the full notch. One time I forgot to keep track of the last time I filled up and my car ran out of gas despite showing half full tank!. With an ohmmeter, attach the red lead on the sending unit terminal, and the black lead to ground on the sending unit. The gauge is provided a certain amount of voltage from the fuel sender. We've got a 2000 Odyssey that seems to have a problem with the fuel gauge stuck on full. Have they made the economy cars that fuel efficient?. American Polywater makes a product that is supposed to free up stuck wire and it costs $86. uel level gauge not working in 2002 Boxster S 2002 Boxster S with 45,000 mi. Chilton book says there is an access hole in the trunk floor, so I plan to pull the module to investigate, but as the whole module is a bit pricey, any suggestions as to how to clean or re-tension the sender wiper contact?. :) upon reassembly the Gauge is not as erratic because it it is mostly stuck at 1/4 full. As is the built in Range figure that comes up in the speedometer window. The gauge should read full nuts full. After 4 years of ownership and 270 hrs the fuel gauge on my B3030 HSDC is now stuck on full. It could be the wire that connects the two, or the gas tank sending unit (the device in the tank that measures the fuel level and tells the needle where to point). The fuel gauge utilizes a voltage stabilizer located on the back of the instrument cluster. Any words of wisdom would be appreciated. I just purchased this boat a week ago. 11-5-2015 Did anyone find a fix for this issue?. I should do that because when my gauge reads 1/4 full the tank is closer to. Poor connection at underdash to tail lamp harness plug. I'd suspect a stuck float more than a faulty gauge. I removed the sending unit and tested the float in a bucket of diesel fuel and it moves freely up and down. Troubleshooting Your Chevy Truck Gas Gauge Failure. RAY The fact that the needle stays at "full," means that the gauge on the dashboard is working properly. The simplest explanation of a faulty fuel gauge is that the float in the gas tank has gotten stuck in a certain position. I just got a 1997 Riviera with 45,000 original miles. How do i fix this? anyway to check it and see whats wrong, it was working perfectly fine, till i topped it off with gas (just got the car 2 weeks ago) and since then its been stuck on full. 1290SA fuel gauge stuck on full. Then, I turned the ignition switch back off. Checking Boat Fuel Gauges And Fuel Sending Units. How can I fix or how can it be fixed? Thanks so much. It will stay at 1/2 tank for a good long time and then drop to Idiot Light territory. Thus, not a cheap or easy job. It only reads full at first I thought it was a stuck float and thought it had to fall down one day. unlike questionable quality software, fuel gauge getting stuck at the same level of fuel in the tank is indicative of either something being in the tank (and preventing further movement of the sender) or failure of the sender unit. The connection between VAT and depreciation is a falacy. This is the first time that this has happened to me. I have a 97 civic ex during the summer well now thats is warmm the Gas GAuge gets stuck on Full and it doesnt go down unless i use alot i mean like 5 bottles of the stp gas treatment during winter ill show me how much i have the gauge us down but when the cars is warm the gauge goes back up any1 wat might b the problem my mechanic said its not the fuel pump its the decending unit but i couldnt. The last several weeks the gas gauge stays on full or acts very irratically, then returns to full. First day I started with 3/4 full tank ran it down to about 1/4 tank. I drove and drove for many kilometers thinking how light my car is on fuel as the gauge is not moving. here we go again with this darn gas gauge !! its been working fine, now it stopped again !! 71 c30 longhorn 1 yr old tank and sending unit reads empty , if you pull wire off reads full , new circit board on back of dash, new wire to tank!! last time i install a new rear bumper and it started working!! dont ask, what that had to do with anything but it did , any suggestions???. The bad part is it is in the fuel tank and part of the fuel pump. It was a pretty miserable night, and I can't remember if I shut the truck down when I fueled. I got the new sender from Country Coach. I switch wires around black to pink and pink to ground and gauge still reads full. Is this a bad sending unit? Bad gauge? When I disconnect the harness wire that goes from the sender to the gauge and ground it, it still reads full. 120 gallon tank I thought was full. Now I have a truck with 40k and no fuel gauge at all… Anybody else having this problem. My wife's Ford Fiesta's gas guage also stuck, I added Marvel Mystery Oil to the gas the gauge started working again must have freed the float. 1987 mustang gt fuel gauge wont work need help i have a 1987 mustang gt, the fuel gauge is stuck on full i do not want to drop the tank yet, if there is a easier fix to this no blown fuses and i just put five gallons of gas in and all other gauges work. Usually they just get corroded and stuck in one position. Explore Our Forums. Now at 42,000 miles, at times the fuel gauge remains on "full" for about 100 - 150 miles. When I topped up my tank to full, I was waiting inside the car with it still on, but I went from Empty to Full so it showed accurately on my fuel gauge. The fuel gauge on my '99 4WD four door has been stuck on full for several months. Now the fuel gauge only goes to a quarter, and will not indicate 3/4 full. The mech said he will check it and when i got the car back, the fuel gauge said 1/2 (which was about right). to insure that they read empty when the tank is. Chances are the fuel gauge problem is the result of a bad rheostat on the fuel pump float. This is a discussion on Fuel Gauge stuck on full within the General Help forums, part of the LSx Technical Help Section category; The fuel gauge on my 2002 Trans AM is stuck on full. I have a 2007 G35 Coupe and am having problem with the gas gauge. Gas Gauge Stuck On Full ? I think I go about 60-70 miles before my scion registers any fuel usage when I full it really high. The last several weeks the gas gauge stays on full or acts very irratically, then returns to full. Don´t know about the 94, but in the earlier models, a gas gauge stuck in the full position, meant an open circuit, a plug unplugged or a broken wire (back by the gas tank/ a branch would get stuck in there and pull the connector apart or break the wire). I've seen a couple GM's that were misleading because when I was testing the resistance, I was holding the float arm up, making the contact good. probably on the coil that pulls it to empty. I drove the car 200 miles since then and the gas hand still says full and hasn&. The fuel gauge in my 1999 Corolla is stuck on Full. the fuel gauge is not working no matter how much gas i put in the gauge stays at a 1/4 of a tank left. I have full range of motion in the gauge and it seems to be working properly based on tests above. Shop, read reviews, or ask questions about Fuel Gauges at the official West Marine online store. Have a 2008 and this is the first problem. When in one position, the juice is greater, and it sends the needle over to full. Fuel Gauge stuck on full. This is a 2017 Scarab 215. My fuel gauge was stuck on above full. When i turn the ignition on, it still moves and when i start the truck it recalibrates as it always did just upside down now. So tonight after the past few days of -2x degrees, i noticed my fuel gauge staying past full, then today, it fell down below F (to the right) that and is pointing down wards now. It was stuck on full. How do I fix it? I just bought a 1999 Ford Contour. Fuel gauge went up and down. A faulty fuel gauge resistor can send a bad signal to the instrument cluster which can. From what I read, some people don't see any changes on the fuel gauge after refueling for just a relatively small amount. I have replaced the fuel gauge sender and pump, replace the lcd display and still it is stuck on 2 bars. Jump to page: problem was the starter solenoid and was caused by fuel leaking from fuel pressure reg down onto. When there are issues with a manual gauge you may see that the lever goes below the empty meter on the gas panel. RE: My gas gauge is stuck on full. Replied by Beefy on topic 99 honda civic EX, fuel gage stuck on full You need to check the the sending unit changes resistance when you go through the sweep. No more leak, but now I can't tell how much gas I have. Most gas tank units consist of two parts, the gas gauge mounted in the dash and a tank sender mounted in the tank. I went to drive to work today and noticed the fuel gauge was displaying close to half a tank. Is there a way to calibrate the gauge or should I just replace it. Re: Fuel Gauge Stuck as Full MH has it correct. I removed the dash to check for tightness of all wires, everything appears fine. All that unit is, is an electrical voltage device. My fuel gauge is not working properly, I sometimes get 2 bubbles showing on a full tank of fuel, and it stays that way all day or longer, then goes to 3 or 4 bubbles, what gives here?Sometimes I see 2, 3, or 4 bubbles on a 3/4 full tank. Filled the gas tank as full as I could get it. Then, if needed, lift the tank a bit to ensure the fuel pump connection is good. I believe you need to drop axle components to drop the tank and access the parts. The gas gauge on my 2002 CR-V (76,402 miles if you can believe it) has been funky for about 3 fill-ups. Now, 2 days before an over 3000 mile trip down to Southern TX & back, it's sticking and it's 50 degrees!. Is the fuel gauge supposed to cycle. I replaced the fuel pump on my 2002 Jetta GLS with a 2. We filled it in Frisco, CO, drove four hours in heavy, slow traffic on I-70 to get home (approx. About 2 weeks later gas gauge was stuck on full after a full up. i'm going to show you how to fix your fuel gauge the easy way before you buy new part when it can just be a bad ground wire to the fuel level that can make it jump work sometime or not at all most. Thank god it was a truck and not a car, all I had to do was undo the 6 bolts and remove the bed. Find out How To Diagnose Gauge Problems in the March issue of Mustang Monthly Magazine. The fuel gauge on the Montana was getting erratic, jumping up and down and now it’s stuck on full the whole time. Is the Gauge Operating Properly or is It Stuck on Either Empty or Full? Making sure that the physical fuel gauge itself is operating properly is the first place we need to start. kwoolard-I have a similar problem with my fuel gauge except that it "works" erratically, sometimes full, half, etc. I finally took it in to the dealer just before Thanksgiving. When in one position, the juice is greater, and it sends the needle over to full. Then i turn the key off and back on and now the fuel gauge went to empty!. Curiously the gauge did move a littlefrom pegged all the way to just a hair below the "full" mark. Again, on th mach 1. Fuel Gauge Stuck On Full. None were found. 00 a gallon plus shipping and has to be ordered directly from them. It was a pretty miserable night, and I can't remember if I shut the truck down when I fueled. Finally, if you remove your sending unit from the fuel tank you can test the sending unit. If the fuel gauge isn't working on a 1999 Chevrolet Blazer it could possibly be because the float is stuck in the fuel tank. I took sender out of tank. Fuel gauge reads full when full, pretty close to right at 3/4 although sometimes goes back to full, but goes crazy below 1/2 tank. Hi guys, The fuel gauge on my Audi TT Quattro 2000 Mk1 is stuck on full. It only reads full at first I thought it was a stuck float and thought it had to fall down one day. The car runs without any problems though my fuel gauge is stuck at. Well, that's common practice here in the Philippines as well. I can get the car to start if the carb bowl is full, but once it is running the fuel pump stops sending fuel. Now I have checked the amount in the tank and the fuel is about half way, I found the plug on the bottom of the fuel tank and measured the resistance of the fuel sender it was about 50 Ohms. This appears to continue monitoring the fuel level and the gauge moves back to full as the gas is being added. Gas was at least 4 years old so I had two 55 gallon drums to receive the old gas but it only filled up one of them before running dry. I am currently looking at a 87 corvette that has a fuel gauge that reads full all the time. If the tank is empty, resistance is high and voltage is low. That explains that part. Stuck on 2 bars on the gauge. Re: Fuel gauge stuck on full I grounded out the wire and the gauge moved down to empty. 1970 Chevelle gas gauge stuck past full I know this is kind of a common issue but my gas gauge has been stuck past full (3 O'Clock position) for awhile now. Whenever I fill up my fuel gauge needle would stay stuck on Full then after some driving then it would shoot down to maybe 3/4. Just the fuel gauge is out Supplement. If your fuel gauge is behaving erratically but the rest of your instrument cluster seems to be functioning normally, it may be best to visit your local mechanic to get your fuel gauge problem diagnosed. RE: My gas gauge is stuck on full. Question: Battery problem caused all needles in dash to fly rapidly back and forth, all needles went back to normal, except the gas gauge needle which stuck over the full notch. I have a 93 Bronco and the fuel gauge will go all kinds of crazy it will go from empty to full to way over full to anywhere in between while sitting still idling. I've seen a couple GM's that were misleading because when I was testing the resistance, I was holding the float arm up, making the contact good. Does anyone have problems with their fuel gauge. If the gauge doesn't do anything, the wire and/or the gauge is defective. I just replaced the fuel tank sending unit because fuel gauge gave eratic readings. So on the way up the gauge worked fine, its just on the way back it is stuck on full. The gas gauge has remained on "full" even though we have put 12 hours on the engine. Oh Well! RJ. When I topped up my tank to full, I was waiting inside the car with it still on, but I went from Empty to Full so it showed accurately on my fuel gauge. I refitted the gauge and float/sender unit back into the car and refilled with gas. (its on a national backorder) Finally after many calls to the service writer, he told me the parts were in, and. Other times it will show the tank at a full level when it shouldn't be, for example, 85 miles driven on a full tank of gas. Now I have checked the amount in the tank and the fuel is about half way, I found the plug on the bottom of the fuel tank and measured the resistance of the fuel sender it was about 50 Ohms. However, it does not mean that the gauge is capable of accurate readings. Gauge should read full. My gas gauge is stuck on full i check the fuse but it isn't the fuse and my tank isn't full wat cud be da problem - Answered by a verified Ford Mechanic. Fuel Gauge Stuck on Full Typically it would unstick before I used the full tank of gas. Recently, she noticed that the fuel gauge indicated more gas than there could have been in the tank. I think the sender is a type of resistor that when the tank is full allows maximum current to pass through allowing the needle on the gauge to do a full sweep over to signal that the tank is full. I guessed it would be about half full, put petrol in and it took about £38 which is the cost of filling it up from nearly empty. I knew that tank was at least 1/2 full before battery died, so I thought maybe gas siphoning gremlin got me as car was left unlocked night before battery died. I've had my boat a whole 4 days now and I've noticed my fuel gauge is off. Bad sending unit? Made sure to hit a few bumps in the road while tank was low on fuel in the event that float was stuck. After 4 years of ownership and 270 hrs the fuel gauge on my B3030 HSDC is now stuck on full. The test for this is straightforward. How to determine if your boat's fuel gauge or fuel gauge sending unit is bad. Saturday, May 01, 2010. This Site Might Help You. The fuel injection pump tester comes with flex hoses, fittings and instructions for quick reference. Use a special fuel gauge resistor to protect the original 6 volt fuel gauge that will be running in a 12 volt system. my 95 fl70 has a erratic fuel gauge. Measured the resistance and got a multimeter reading of about 30 ohms. How and why the test works… Most of the fuel gauge failures give a stuck on full or stuck on empty as a problem symptom. Now I have a truck with 40k and no fuel gauge at all… Anybody else having this problem. After the tank was full, and as I was driving away from the filling station, I noticed that the gauge is pegged to the right. Disconnecting the sender wires does drop the gauge to zero. Fuel Gauge Stuck On Full. Fuel gauge stuck on full. You also might want to use the cluster test function (it's in the wiki too). I just figured maybe it was stuck no big deal truck's not used to so many fill ups in that short a time. And if I unplug the wire from sending unit to gauge it still reads past full. It could be bad but I doubt it's stuck. If it has shorted out, it may be sending full power all the time. (its on a national backorder) Finally after many calls to the service writer, he told me the parts were in, and. The gas gauge on my 2002 CR-V (76,402 miles if you can believe it) has been funky for about 3 fill-ups.